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प्रश्न
What is a symbol? What information does it convey?
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उत्तर
A symbol is the short form which stands for the atom of a specific element or the abbreviations used for the names of elements.
It represents a specific element.
It represents one atom of an element.
A symbol represents how many atoms are present in its one gram (gm) atom.
It represents the number of times an atom is heavier than one atomic mass unit (amu) taken as a standard.
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संबंधित प्रश्न
Write the names of following elements Na, C, Kr, U, Ra, Fe, Co.
Match the formulas of the following of bases with their correct names.
Bases – (a) NaOH (b) KOH (c) Ca(OH)2 (d) Zn(OH)2
Names – (1) Potassium hydroxide (2) Zinc hydroxide (3) Aluminium hydroxide (4) Calcium hydroxide (5) Sodium hydroxide
Give the symbol of the following element:
Chlorine [chloride]
State the type of element for the following:
Boron
Give the symbol of the following element:
Phosphate
Give the formula of the following gas:
Hydrogen chloride
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Tin
write symbol with the variable valency
Fill in the blank with the correct word from the options given below:
A symbol represents a short form of a / an ________.
Write the symbols for the following elements.
- Oxygen
- Gold
- Calcium
- Cadmium
- Iron
Which letter is never used in any element symbol?
